The Research On Frame Structure Rubber Bearing Base-isolated System

This paper mainly does the research with 3D frame base-isolated structure.According to the real structure,the model is constructed and analyzed with the aid of the finite element theory.The nonlinear time history method is applied to dynamic analysis of traditional seismic structure and base-isolated structure. At the same time,the analysis,study and discuss are carried on between traditional seismic structure and base-isolated structure.Moreover,this paper carrys on some discusses on optimized design of base-isolated structure,and puts forword some suggesting to the base-isolated structure.The study indicates that the base-isolated structure has reduced the horizontal stiffness and enlarges the self-vibration period.Thus, makes its frequency far away from occur with the place earthquaking. Therefore,these will reduce the horizontal earthquake effect. The deformation of the structure mainly focused on the isolated layers and the superstructure shift as a whole .The interlayer displacement of the isolation system is far low.The earthquake effect of the base-isolated structure is dicided on the horizontal stiffness and elastic and plastic capability of the isolated layer, the base shear ,the interlayer shear ,th'e interlayer displacement of the isolation system is far lower than the result of the base-fixed system under the same condition of the superstructure. The horizontal stiffness of isolated layer is reduced ,the effect of the base-isolated structure is clear.and the damping is enlarged to reduce the displacement of the superstructure. The elastic and plastic dynamic analysis method based on the beam-column-shell model is applied to analyze the seismic response of reinforced concrete frame structure : base-isolated structure and traditional seismic structure.According to the different response under the different earthquake waves,the results of analysis indicates that the isolated system has better effect, the base-isolated structure is not only safe and prone to analyze.The research of this paper is aimed at by way of analysis and research with the 3D frame base-isolated structure and thoroughly announces the property and superiority of the base-isolated structure , and makes perfect design method base-isolated structure , and pushes on the development and the application in our country of base-isolated technology...